qg-size 8

q bitrate ssim vmaf speed x265 --y4m -D10 --asm avx512 -pslowxx --crf {q} --ctu 64 --qg-size 8 -o "{o}" -
14 14162.78 kbps 0.9996394062400515 98.81522678234003 8.25 fps
18 8230.18 kbps 0.9993271544200851 98.56980882260785 9.84 fps
22 5180.15 kbps 0.998741872503101 98.10152839195666 11.49 fps
26 3369.61 kbps 0.9975440867201779 97.1135123156586 13.3 fps

qg-size 16

q bitrate ssim vmaf speed x265 --y4m -D10 --asm avx512 -pslowxx --crf {q} --ctu 64 --qg-size 16 -o "{o}" -
14 12085.39 kbps 0.9996159944928847 98.7761658505202 8.39 fps
18 6924.83 kbps 0.9992866132252288 98.51063734654686 10.26 fps
22 4358.27 kbps 0.9986636209549716 97.99584067909845 11.94 fps
26 2857.53 kbps 0.9973891839508434 96.89595836635073 13.69 fps

qg-size 32

q bitrate ssim vmaf speed x265 --y4m -D10 --asm avx512 -pslowxx --crf {q} --ctu 64 --qg-size 32 -o "{o}" -
14 11595.41 kbps 0.999623884379368 98.79516304299182 8.42 fps
18 6675.84 kbps 0.9993105267462313 98.55975942619561 10.23 fps
22 4200.91 kbps 0.9987240817936538 98.10759091322338 11.87 fps
26 2739.04 kbps 0.9975343247643979 97.14705700976964 13.6 fps

qg-size 64

q bitrate ssim vmaf speed x265 --y4m -D10 --asm avx512 -pslowxx --crf {q} --ctu 64 --qg-size 64 -o "{o}" -
14 11532.38 kbps 0.9996223999848546 98.81429073730767 8.48 fps
18 6705.13 kbps 0.9993161419464482 98.59962353976415 10.26 fps
22 4212.48 kbps 0.998746319976416 98.19747831757505 11.87 fps
26 2732.38 kbps 0.9975949812201186 97.34343988053969 13.61 fps